Pulp-machine.



M. HANSON PULP MAGHINE.

APPLIOATION mum mm: 11. 1910.

Patented Mar. 14, 1911.

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M. HANSON. PULP MACHINE. APPLICATION FILED JUNE 11. 1910 2 SHEETS-SHEET2.

Patented Mar. 14, 1911.

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MARTIN HANSON, OF MARINETTE, WISCONSIN.

PULP-MACHINE.

Specification of Letters Patent.

Application filed June 11, 1910.

Patented Mar. 14, 1911.

Serial No. 566,428.

To all whom it may concern:

Be it known that I, MARTIN HANSON, a citizen of the United States,residing at Marinette, in the county of Marinette and State oflVisconsin, have invented certain new and useful Improvements inPulp-Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in pulp machines and is a specificimprovement over the machine shown in my former Patent, No. 901,168,dated October 13, 1908, and the object of my invention is tospecifically improve that construction and to provide a simple andeffectively working machine by which the wet pul'p collected on the rollmay be automatically stripped from said roll when a layer of the desiredthickness has been formed.

With this object in view, my invention consists in the construction andcombinations of parts as hereinafter described and claimed.

In the accompanying drawings--Figure 1 is a side view of a part of apulp machine embodying my invention. Fig. 2 is a side view, on a largerscale, of the top of the machine in a difierent position. Fig. 3 is adetailed view showing part of the frame, a shaft and the hand wheelthereon.

1 represents the base of the machine, having fastened thereto a bentframe 2.

3 represents the lower press roll and 4 the upper press roll, whichrests directly thereagainst, an endless felt belt 5 running betweenthese rolls in the usual way. The bearings and supports for these rollsare not shown on the drawing. Above the top press roll 4 is the frictionroll 5, which operates the doctor knife, said roll having one part madesolid and the other hollow, so that the solid part acts as a weight toalways bring, or tend to bring, the top roll 4 into the position shownin Fig. 1.

The upright frame 2 is provided with a series of apertures 6 and 7,through which bolts 8 pass, engaging with apertures in the brackets 9and 10, respectively, by means of which the brackets may be adjusted.The brackets 9 and 10 may be, and preferably are, made in one piece.

The roll 3 is provided on one edge with teeth 11, which engage thesprocket chain 12,

which passes over a sprocket wheel 13, which is secured to a shaft 14,mounted in bearings at the junction of the brackets 9 and 10. On thisshaft is also mounted a second sprocket wheel 15, over which a sprocketchain 16 runs, engaging a sprocket wheel 17 on a shaft 18, mounted inbearings secured to the frame 2, and the shaft 18 also carries a gearwheel 19.

The frame 2, at about the center of the top press roll 4, is providedwith an extension 20, cut away in the center to form guides for theblock 21, which slides therein, the position of said block beingdetermined by means of the bolt 22, which is fastened into said block soas to turn freely therein and passes loosely through the hole in theframe 2, nuts 39 being used to fasten said bolt in various positions, sothat the block 21 may be readily adjusted back and forth. In the block21 is mounted a shaft 23, to which is fastened at the ends, upwardlyextending arms 24, to which arms the doctor knife 25 is bolted orotherwise secured.

The friction roll 5 is mounted in bearings in the top portion of thebent frame 2, which bearings are adjustable by means of bolts 26 and 27,so that the thickness of the layer of pulp which is brought along by theband 5*, and which collects on the roll 4, may be varied at will. Thefriction roll 5 is mounted on a shaft 28, which is provided with a cam29, with which a roller 30 is adapted to engage. This roller is carriedon a pin in the sliding arm 31, one end of which is forked and embracesthe shaft 28. 32 represents a spring, which keeps the roller 30 incontact with the cam 29. To the other end of the arm 31 is pivotallyconnected one arm of a swinging lever 33, pivoted at 34 on a bearingcarried by the frame 2.

Pivotally attached to the lever 33 is a rod 35, screw-threaded as shown,and this rod passes loosely through holes in extensions 36 of a slidableblock 37 nuts 38, mounted on said rod 35, being used for the purpose ofadjusting said block on said rod. The block 37 slides freely in guides40, formed in an extension of the frame 2, its position being determinedby the nuts on the rod 35. In the block 37 is mounted a shaft 41,provided with a hand wheel 47 on one end, and also provided with a gearwheel 42, which is adapted to mesh with the gear wheel 19 when the block37 is shifted, as hereinafter described. On the shaft 41 are mountedcrank arms 43, to which are pivoted rods.

44, which rods 7 are united by doublethreaded nuts 45 to rods 46,pivotally attached to the brackets 24 in which the doctor knife ismounted, there being two of these crank shafts to operate the doctorknife, one.

at each end of the machine. In fact, the entire structure may beduplicated at both sides of the machine, if it is desired.

The operation is as follows :A layer of pulp is brought along by theband 5 and collects, as usual, on the top press roll 4. As it passesbetween the rolls 3 and 4, it collects on the upper press roll 4 untilthe latter finally rises, the bearings being movable, until it strikesagainst the friction roller 5. The friction roller 5 is then operatedand by means of the arm 31, lever 33, and rod 35, it presses the block37 to the right in the position shown in Fig. 2, until the gear wheel 42contacts with the gear wheel 19, whereupon, by means of the sprocketchains and connections already described, the shaft 41 is rotated,bringing the doctor knife down against the top press roll 4 andstripping from said roll the layer of pulp. It should be noted that thedoctor knife is located above the center of the roll 4, thus strippingthe layer of pulp from above said roll instead of from below it, whichaction I have found in practice to be advantageous. The hand wheel 47 isprovided so that'the doctor knife 25 may be operated by hand in case thestock crushes. In starting on a new lot of pulp, sometimes it happensthat the stock will not collect in an even layer upon the roll 4, and itis desired to clean ofi said roll. The

doctor knife is then operated by hand.

I claim r V 1..In a pulpmachine, the combination of a supporting frame,vertically arranged rolls therein, means for conducting pulp between twoof said rolls, a pivotally mounted knife-- edged doctor, adjustablebearings for said doctor, a swinging weighted roller adapted to beoperated by the upper roll when the layer of pulp thereon has attainedthe desired thickness, a cam carried by said roller, v adjustableconnections between said cam and said doctor, including devices wherebythe movement of said cam brings into play gear wheels engaging with eachother, throwing the doctor knife into contact with the upper press roll,substantially as described.

2. In a pulp machine, the combination of a supporting frame, verticallyarranged rolls therein, movable bearings in said frame, a weighted rollsupported in said frame above said press roll, a cam operatively carriedby said weighted roll, an arm operated by said cam, a doctor, adjustableconnections between said arm and said doctor, including gear wheelsadapted to be thrown into mesh by the movement of said arm, and crankarms operated by said gear wheels to throw said knife-edged doctor intocontact with the upper press roll, substantially as described.

3. In a pulp machine, the combination of a. supporting frame, verticallyarranged rolls, means for conducting pulp between said rolls, apivotally mounted knife-edged doctor, adjustable bearings in which saiddoctor is mounted, a weightedroll adapted to be engaged by the upperpress roll when the layer of pulp thereon has attained the desiredthickness, a cam carried by said weighted roll, an arm provided with aroller engaging said cam, a lever pivotally connected to said arm, a rodcarried by said lever, a bearing block adjustably secured to said rod, ashaft secured in said bearing block and provided with a hand wheel,crank connections between said block and said knife-edged doctor, and agear wheel adapted to mesh with said first named gear wheel when thelatter is moved by the movement of said arm, substantially as described.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

MARTIN HANSON. Witnesses ALFRED I'IANEBEOK,

WALTER P. Sn'rmerrr.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

